Zirconia Muaj Qhov Txawv Siab Melting, Muaj Qhov Ua Phem Siab, Thiab Siab Hloov Hluav Taws Xob

Zirconium dioxide (tshuaj kua tshuaj: ZrO2) yog cov tseem ceeb oxide ntawm zirconium. Nws yog xim dawb, tsis muaj ntxhiab thiab tsw qab iav ci hauv cov neeg mob. Nws yog cov insoluble hauv dej, hydrochloric acid thiab dilute sulfuric acid. Feem ntau muaj qee qhov me me ntawm hafnium dioxide. Cov khoom siv tshuaj yog qhov ua tsis tau zoo, thiab muaj cov yam ntxwv ntawm siab melting point, siab resistivity, siab refractive index thiab tsis coefficient ntawm thermal nthuav, ua nws tseem ceeb kub tiv taus cov khoom, ceramic insulating khoom thiab ceramic tshuaj pleev thaiv hnub, thiab nws kuj yog lub ntsiab cov khoom siv raw rau kev xyaum ua kom zoo nkauj. Qhov qhab kis yog li 5-7eV.

Dawb amorphous hmoov hmoov. Tsis muaj ntxhiab. Tsis qab. Soluble hauv qhov sib xyaw ntawm 2 feem sulfuric acid thiab 1 feem dej, soluble me ntsis hauv hydrochloric acid thiab nitric acid, maj mam soluble hauv hydrofluoric acid, yuav luag insoluble hauv dej. Chim siab. Tus txheeb ze tus ceev yog 5.85. Melting point 2680 ℃. Cov ntsiab lus kub yog 4300 ℃. Hardness yog qhov qis dua rau pob zeb diamond.

Siv los ua cov hlau zirconium thiab cov zirconium tebchaw, ua cov pob zeb refractory cib thiab ntsia saum npoo, lub siab ua haujlwm ceramics, cov ntaub ntawv tsis zoo, cov xim ua kom zoo nkauj thiab zirconates, thiab lwm yam, feem ntau yog siv rau piezoelectric ceramic khoom, niaj hnub siv ceramics, cov ntaub ntawv refractory thiab cov hlau zoo nkauj smelting Zirconium cib, zirconium raj, crucible, thiab lwm yam. Nws tseem siv los tsim cov hlau thiab hlau tsis muaj hlau, tsom iav iav thiab zirconium dioxide fiber ntau. Nws kuj yog siv hauv cov xim muaj hlau, cov xim pleev xim rau cov xim pleev xim thiab cov xim pleev xim. Siv hauv cov txheej txheem epoxy tuaj yeem ua rau kom qhov corrosion ntawm tshav kub-dej ntsev dej.

Zirconia fiber ntau yog cov khoom siv fiber ntau refractory fiber ntau. Vim tias lub siab yaj dua, tsis muaj oxidation thiab lwm yam kub ntawm ZrO2 nws tus kheej, ZrO2 fiber muaj qhov kub siv ntau dua li alumina fiber, mullite fiber, aluminium silicate fiber thiab lwm yam fiber ntau refractory fiber ntau. Cov zirconia fiber ntau siv tau ntev ntev nyob rau hauv kev ua haujlwm kub-oxidizing cov huab cua siab tshaj 1500 ℃. Kev ua haujlwm siab tshaj plaws yog nce mus txog 2200 and, thiab nws tseem tuaj yeem tswj cov fiber ntau ua tiav mus txog 2500 ℃, thiab lub siab kub ua tshuaj lom neeg ruaj khov, tiv thaiv corrosion, oxidation tsis kam, thermal shock tsis kam, tsis-hloov thiab tsis kuab paug, nws yog cov khoom siv fiber ntau tshaj plaws hauv ntiaj teb. Cov kuj ntawm ZrO2 rau kua qaub thiab alkali corrosion muaj zog ntau dua li ntawm SiO2 thiab Al2O3. Insoluble hauv dej, soluble hauv sulfuric acid thiab hydrofluoric acid; me ntsis soluble hauv hydrochloric acid thiab nitric acid. Yuav ua tau eutectic nrog alkali los tsim cov zirconate.